    /* 头部 */
    
    .head {
        width: 100%;
        height: 64px;
        position: absolute;
        z-index: 100;
        min-width: 1200px;
        border-bottom: 1px solid #ccc;
    }
    
    #bor {
        border-bottom: 3px solid white;
    }
    
    .headb a {
        line-height: 64px;
        display: inline-block;
        text-align: center;
        margin-left: 36px;
    }
    
    .headb a:hover {
        color: white;
        border-bottom: 3px solid rgb(72, 255, 0);
    }
    
    .headb {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
    }
    
    .heada {
        margin-top: 16px;
        margin-left: 30px;
    }
    
    .headc {
        line-height: 64px;
    }
    
    .headc button {
        margin-right: 20px;
        border-radius: 10px;
        width: 60px;
        line-height: 24px;
        font-size: 14px;
        color: #fff;
    }
    
    .buttona {
        background-color: rgba(135, 207, 235, 0.8);
        border: 2px solid rgba(255, 255, 255, 0.5);
    }
    
    .buttonb {
        background-color: red;
        border: none;
    }
    /* 粒子 */
    
    .my-canvas {
        height: 360px;
        background-color: rgba(0, 0, 0, 0.88);
    }
    
    canvas {
        position: absolute !important;
        height: 360px;
        width: 100%;
    }
    /* 宣传 */
    
    .case-title {
        font-size: 16px;
        line-height: 26px;
        color: #000;
        padding: 20px 0;
    }
    
    .case-title::after {
        content: '';
        display: block;
        width: 16px;
        height: 2px;
        background-color: blue;
    }
    
    .case-list li {
        width: 360px;
        height: 340px;
        float: left;
        border: 1px solid #ccc;
        margin-right: 60px;
        background: color #f4f4f4;
        box-sizing: border-box;
        padding: 10px;
    }
    
    .case-list li:last-child {
        margin-right: 0;
    }
    
    .case-list li img {
        width: 100%;
    }
    
    .case-list li h3 {
        font-size: 16px;
        line-height: 40px;
        color: #181818;
    }
    
    .case-list li p {
        font-size: 12px;
        line-height: 16px;
        color: #666;
        margin-bottom: 16px;
        display: -webkit-box;
        -webkit-box-clamp: 4;
        overflow: hidden;
    }
    
    .case-list li a {
        color: blue;
    }
    
    .case-ul li {
        width: 360px;
        line-height: 100px;
        background-color: #ccc;
        text-align: center;
        float: left;
        margin-right: 20px;
        margin-bottom: 20px;
    }
    
    .case-ul li img {
        width: 130px;
        height: 40px;
    }
    
    .foot {
        margin-top: 40px;
        height: 350px;
    }
    
    .foot-a {
        width: 800px;
        box-sizing: border-box;
    }
    
    h6 {
        font-size: 12px;
        margin-top: 40px;
        margin-bottom: 35px;
    }
    
    .foot-ul {
        float: left;
        margin-right: 78px;
    }
    
    .foot-ul li {
        font-size: 8px;
        color: #ccc;
        margin-top: 16px;
    }
    
    .foot-bb {
        text-align: center;
        box-sizing: border-box;
    }
    
    .foot-bb h6 {
        margin-bottom: 6px;
    }
    
    .foot-bb p {
        font-size: 10px;
        color: #ccc;
    }
    
    .foot-img {
        margin: 35px auto;
    }
    
    .foot-img img {
        padding-left: 150px;
    }
    
    .foot-text {
        font-size: 10px;
        font-weight: normal;
        padding-bottom: 70px;
        color: #ccc;
        padding-left: 860px;
    }
    
    .bei {
        height: 20px;
        padding-top: 10px;
        display: block;
    }
    
    .bei span {
        font-size: 10px;
        color: #ccc;
        display: inline-block;
        padding-top: 50px;
    }
    
    .bei img {
        padding-right: 10px;
    }
    
    .btn-top {
        width: 40px;
        height: 40px;
        background: url(../imgs/returntopicon.jpg) no-repeat -267px -56px;
        position: fixed;
        right: 20px;
        bottom: 20px;
        background-color: #fff;
    }
    
    .btn-top:hover {
        background-position-y: -97px;
    }
    
    .aside {
        width: 30px;
        line-height: 30px;
    }